Elbow for a rail system



FIG. 1 is a front perspective view of an elbow for a rail system;

FIG. 2 is a side view of the elbow of FIG. 1;

FIG. 3 is a front view of the elbow of FIG. 1;

FIG. 4 is a rear view of the elbow of FIG. 1;

FIG. 5 is a bottom view of the elbow of FIG. 1;

FIG. 6 is a top view of the elbow of FIG. 1; and,

FIG. 7 is an opposing side view of the elbow of FIG. 1.

In the drawings, the broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an elbow for a rail system, as shown and described. 